c. Carefully place the tester on its end or side.
(See Fig. 4-2).
e. Swab the ring which is located on the bottom
of the tester. Do not swab the source rod or the shutter.
(See Fig. 4-2).
f. Place the cotton swab on the sheet of plastic
g. Return the tester to its upright position. (See
Figure 4-2. Swabbing the Ring
h. Loosen the four screws which are located in
the corners of the testers display panel. Lift the panel out
of the tester and support it on the case. (See Fig. 4-3).
i. With the same swab that was used in e above,
swab the red spot which is located within the tester and
next to the internal radiation detector. The spot to be
swabbed may not be painted red in some testers. (See
j. Wrap just the cotton swab and an inch or two
of the stick with plastic wrap. Seal the plastic wrap
around the stick with cellophane tape.
Figure 4-3. Swabbing the Spot
k. Reinstall the display panel in the tester and
tighten the four screws.
I. The swab shall be tested for radiation in an
area where background radiation averages 0.04 mrem/hr
(1) Adjust the radiac meter AN-PDR/27 or
equivalent to measure 0 to 0.5 mrem/hr.
(2) Open the cover end of the radiac meters
(3) Do not touch the swab to the meters probe.
Place the swab about 0.25 inch in front of the probe and
note the meter reading.
A tester is contaminated when a reading of 0 I
mrem/hr or more (or in the case of Colorado 0.2
mrem/hr or more) is obtained from the swab.
Follow the procedures provided in Para 4-31.
The swab is also contaminated.
The tester shall immediately be withdrawn from
use when the wipe test indicates a reading of 0.1
mrem/hr. (or in the case of Colorado 0.2
mremlhr) or when the laboratory test results
m. Cut off the applicator stick at the tape seal.
n. If a swab reading greater than 0.4 mrem/hr